Developer Reference
Visible to Intel only — GUID: GUID-2AE79CD0-D9B3-43CE-8B54-4A68B48EFB82
Expm1
Computes an exponential of vector elements decreased by 1.
Performance:
Intel® Xeon® Processor E5-2680 | Intel® Xeon® Processor E5-2699 v3 | Intel® Xeon® Processor E5-2699 v4 | Intel® Xeon® Gold 6148 Processor | ||
---|---|---|---|---|---|
single | HA | 4.40 | 5.13 | 4.24 | 1.33 |
LA | 4.40 | 3.37 | 2.84 | 0.71 | |
EP | 2.64 | 3.06 | 2.51 | 0.54 | |
double | HA | 8.19 | 8.67 | 7.33 | 2.64 |
LA | 5.90 | 5.74 | 4.79 | 1.67 | |
EP | 4.36 | 4.01 | 3.37 | 1.24 |
Notes:
- Units - CPE (Clocks per Element)
Performance was measured on "working" interval (double precision: [ -500.0, 500.0 ]; single precision: [ -70.0, 70.0 ])
Data - vectors of 1000 elements with random generated numbers.
All data was collected with 64-bit libraries.
Accuracy:
Intel® Xeon® Processor E5-2680 | Intel® Xeon® Processor E5-2699 v3 | Intel® Xeon® Processor E5-2699 v4 | Intel® Xeon® Gold 6148 Processor | ||
---|---|---|---|---|---|
single | HA | 0.51 | 0.51 | 0.51 | 0.50 |
LA | 1.91 | 1.91 | 1.91 | 1.91 | |
EP | 40.30 | 5.48 | 5.48 | 5.48 | |
double | HA | 0.50 | 0.50 | 0.50 | 0.50 |
LA | 0.96 | 0.96 | 0.96 | 0.92 | |
EP | 1.69E+04 | 1.68E+04 | 1.68E+04 | 2.26E+03 |
NOTE:
Units - ULP (Units in the Last Place).
Performance Graphs:
Parent topic: Exponential